How to Install the Dinan Power Package on the Mercedes-AMG GT

The Mercedes-AMG GT is already a formidable machine, but the Dinan Power Package unlocks its true potential. This comprehensive upgrade combines an ECU tune, high-flow intake, and performance exhaust to deliver a significant horsepower and torque increase, sharper throttle response, and a more engaging driving experience. Whether you're a seasoned DIY enthusiast or a professional installer, this step-by-step guide walks you through the entire installation process with the precision and detail required for a successful upgrade.

Before starting, ensure you have the correct Dinan Power Package kit specifically for your AMG GT model year (2015-2023 for most variants). The kit typically includes the Dinan ECU flash, a carbon-fiber intake system, and a stainless-steel cat-back exhaust with adjustable valves. Confirm your parts against the packing list before proceeding. For reference, you can consult Dinan’s official product page for the latest compatibility notes: Dinan Performance Products.

What You’ll Need – Tools and Preparation

Gathering the right tools and workspace saves time and prevents frustration. Here’s the complete list:

Tools Required

  • Dinan Power Package kit (ECU programmer included)
  • Set of metric sockets and wrenches (8mm to 18mm)
  • Torque wrench (range 10–150 Nm)
  • Flathead and Phillips screwdrivers
  • Trim removal tools (for plastic retainers)
  • OBD-II scanner or Dinan handheld programmer
  • Jackstands and floor jack (if the car sits low; the AMG GT is extremely low)
  • Safety goggles and mechanic’s gloves
  • Shop towels and penetrating oil (for rusty bolts)

Workspace & Safety Precautions

  • Park the vehicle on a level, well-ventilated surface.
  • Allow the engine to cool completely – at least two hours after a drive.
  • Disconnect the battery negative terminal (and wait 5 minutes for capacitor discharge).
  • Keep a fire extinguisher rated for Class B/C nearby.

For torque specifications, refer to the Mercedes factory service manual or a trusted resource like Mercedes-AMG GT official specs and cross-check with the Dinan kit instructions. Skipping torque verification can lead to exhaust leaks or damaged components.

Step 1: Disconnect the Battery and Drain System Pressure

Safety first. Locate the battery in the passenger footwell (behind the carpet panel). Use a 10mm wrench to loosen the negative terminal clamp. Cover the terminal with a non-conductive rag. Wait at least 10 minutes to allow the fuel system to depressurize – this prevents fuel spray when disconnecting intake lines. While waiting, remove the key fob and keep it away from the vehicle to avoid accidental ignition.

Step 2: Remove the Engine Cover and Air Intake Duct

The AMG GT’s engine cover is held by plastic clips and two 8mm bolts at the rear. Carefully pry off the cover using trim tools. Set it aside. Next, loosen the intake duct clamps connecting the air filter box to the throttle bodies. Unplug the MAF sensor connectors by pressing the red locking tab and pulling the connector. Remove the duct completely. You’ll now have access to the factory airbox and the ECU.

Tip: Label all connectors and bolts with tape to avoid confusion during reassembly. Take a photo before removal for reference.

Step 3: Install the Dinan ECU Tune

The heart of the power package is the ECU recalibration. Locate the ECU behind the passenger-side firewall (near the wiper motor). You may need to remove a plastic cover held by 10mm bolts. Unplug both ECU connectors by pressing the release tabs and pulling straight out. Connect the Dinan programmer (included in the kit) to the OBD-II port and follow the on-screen prompts:

  1. Turn ignition to “ON” (engine off, radio off).
  2. Select “ECU Tune – Dinan Power Package.”
  3. Wait for the programmer to read your original ECU file (this takes 5–10 minutes).
  4. Once read, the programmer will prompt you to upload the new file. Do not disconnect or touch any cables during flashing.
  5. After successful flash, the programmer will confirm. Turn ignition OFF, wait 30 seconds, then disconnect the programmer.
  6. Reconnect both ECU connectors, secure the cover, and reinstall the plastic tray.

If the ECU is physically locked (rare on AMG GT), you may need to unlock it via the dealership or a remote service – check Dinan’s support site beforehand. The tune optimizes boost pressure, fuel timing, and transmission shift points for the new hardware.

For additional details on the tuning process, see this Dinan FAQ on ECU flashing.

Step 4: Replace the Air Intake System

Remove the factory airbox by loosening the intake boot clamps and disconnecting the secondary air injection pump hoses (if equipped). The Dinan carbon-fiber intake requires no cutting or drilling. Install the new intake in reverse order:

  • Position the carbon-fiber intake tubes onto the throttle body inlets. Tighten clamps to Dinan’s specified torque (usually 4 Nm for silicone hoses).
  • Attach the heat shield using existing mounting points. The shield helps pull cool air from the front grille.
  • Plug in the MAF sensors (two connectors for the GT). Ensure they click and the red lock engages.
  • Reconnect the secondary air hoses and secure any included brackets.

Note: The Dinan intake uses a larger, high-flow filter. It requires cleaning every 30,000 miles – check the maintenance section in the kit manual. After installation, inspect all silicone couplers for clearance with the engine cover – adjust if necessary.

Step 5: Install the Dinan Performance Exhaust

This step is best performed with a lift or high-quality jackstands. The AMG GT’s exhaust is a single-piece system from the catalytic converters back. You will need an extra pair of hands to maneuver the heavy factory exhaust.

Removal

  1. Penetrating oil on the six exhaust hanger brackets (use 13mm or 15mm bolts). Let it soak for 5 minutes.
  2. Unplug the exhaust valve actuators (located near the rear mufflers). Wire-tie the connectors to the body to avoid them dropping.
  3. Loosen the two V-band clamps at the connection flange behind the catalytic converters (using a 13mm socket). Do not fully remove yet.
  4. Support the center muffler section with a floor jack and a piece of wood. Remove the hanger brackets and lower the exhaust.
  5. Slide the rear muffler section out toward the rear of the car. It’s heavy – have a friend help.

Installation

  1. Position the Dinan cat-back exhaust on the floor. It comes in two sections: front intermediate pipe and rear muffler with valve-controlled tips.
  2. Lift the rear section first and loosely attach the rear hanger brackets. Use the original exhaust hangers – Dinan includes new rubber isolators.
  3. Connect the intermediate pipe with the supplied clamp. Do not tighten fully.
  4. Attach the V-band clamps at the junction with the catalytic converters. Torque to the factory spec: 25 Nm (check your specific model).
  5. Reconnect the exhaust valve actuators. The Dinan system uses the factory wiring; just plug the connectors in.
  6. Adjust the exhaust tips for proper alignment with the bumper cutout. Tighten all clamps and bolts to 25 Nm.
  7. Check clearance around the driveshaft and rear diff. The pipes should have at least 1/2 inch of clearance. Adjust hangers if needed.

Pro Tip: Apply a thin coat of anti-seize on the V-band flanges to prevent rust and make future removal easier. The Dinan exhaust is designed to reduce weight by 10 lbs compared to stock, with a deeper, more aggressive note under load and near-silent cruising in Comfort mode.

For a visual walkthrough of the exhaust installation, reference this Dinan AMG GT exhaust install video (replace with an actual link – Dinan often hosts videos on their channel).

Step 6: Reassemble the Engine Bay and Reconnect Battery

Before closing everything, double-check all connections:

  • Intake clamps secure and properly aligned.
  • MAF sensor connectors clicked.
  • ECU harness fully seated; no loose wires.
  • Exhaust hangers engaged; no contact with chassis.
  • All under-engine bay covers (if removed) reinstalled.

Reconnect the battery negative terminal. Torque the clamp to 12 Nm. Do not overtighten – the brass terminal can crack. Press the brake pedal for 30 seconds to wake up the electronic systems. Close the engine cover and secure clips.

Step 7: Perform a System Check with OBD-II Scanner

Use the Dinan programmer or any OBD-II scanner to scan for diagnostic trouble codes (DTCs). Start the engine without starting (key in position 2) and test the following:

  • Check for any engine misfire codes (none expected).
  • Verify that the exhaust valves cycle (you can hear them click near the mufflers when the engine is started).
  • Ensure the intake MAFs report plausible airflow values (air/fuel ratio should stay between 14.0–15.0 at idle).
  • Clear any historical codes that might have been triggered during the battery disconnect (e.g., steering angle sensor).

If any codes appear, check for loose connectors or vacuum leaks. The most common issue is a MAF sensor not fully seated, causing a rich/lean code. If all clear, proceed to idle the engine and monitor for leaks.

Step 8: Idle Test and Check for Leaks

Start the engine and let it idle for 3–5 minutes. Listen for:

  • Any exhaust leaks (ticking or hissing sounds near the V-bands).
  • Intake whistling (indicating a loose coupler).
  • Valve rattle (rare, but check for loose heat shields).

Rev the engine gently to 2000 RPM and hold for 10 seconds. Check the OBD-II live data for fuel trims – they should stay near 0% (+/- 5%). Allow the engine to cool, then re-torque the exhaust V-band clamps and intake couplers. Heat cycling can cause metal expansion/contraction; a re-torque ensures no leaks develop later.

Step 9: Test Drive and Performance Verification

Take the car for a 30-minute drive using a mix of city and highway roads. In Comfort mode, the exhaust should be subtle; in Sport+, the valves open fully, delivering a bark on upshifts. Pay attention to:

  • Throttle response: The Dinan tune reduces lag. You should feel immediate power from 2500 RPM.
  • Power delivery: Expect an increase of ~100 hp and ~80 lb-ft at the crank (per Dinan’s claims for the GT). Verify by noting how quickly the speed climbs.
  • Transmission behavior: The tune modifies shift points. Upshifts should feel firmer, but not harsh. If the car hunts for gears, check the tune compatibility.
  • Exhaust drone: There should be minimal drone at highway speeds (60–80 mph). If excessive, check the valve operation.

After the test drive, re-scan for DTCs. Most installations proceed without issues. If you experience a check engine light, common causes are a loose gas cap (from battery disconnect) or a slight adaptation needed – drive another 50 miles; the ECU will self-adjust.

Post-Installation Care and Maintenance

Dinan recommends an oil change after the first 500 miles with the new tune. Use approved MB 229.5 spec oil. Clean the intake filter every 30k miles and inspect exhaust clamps annually. The tune is fully CARB-compliant (for models 2018+); keep the included EO sticker affixed under the hood for smog checks. Register your kit with Dinan to activate the warranty.

For ongoing support, join community forums like MBWorld AMG GT forum where owners share tips and dyno results. Many users report consistent gains of 100 hp to the wheels after the package, making the AMG GT a true supercar slayer.

Conclusion

The Dinan Power Package transforms the AMG GT from a grand tourer into a track-capable beast. By following this detailed installation guide, you not only gain a deeper understanding of your car’s mechanics but also ensure the upgrade performs exactly as engineered. The combination of a precision tune, freer-flowing intake, and reduced-backpressure exhaust yields a driving experience that’s both thrilling and refined. Take your time at each step, double-check your work, and enjoy the newfound power. Your AMG GT deserves nothing less.